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In the words of BMW, the Concept M4 GTS is “an initial preview of a high-performance model for use on the road and, above all, on the race track.”
Unveiled at the Pebble Beach Concours d’Elegance, the GTS has a number of motorsport-inspired features that set it apart from a regular M4 Coupé.

For example, the 3.0 litre, straight-six, twin-turbo engine gains water injection. This system cools the intake air, enables a higher boost pressure and allows alterations to the fuel injection timing. The result is claimed to be a significant increase in power and torque, but BMW has yet to release any figures.

The front splitter and prominent rear wing, which are both made from carbon fibre, are manually adjustable. That means the car’s aerodynamic balance can be fine-tuned, even if most track day enthusiasts probably won’t have a clue what they’re doing.

Other changes include a larger front air intake and an upgraded cooling setup. To save weight, the bonnet is made from carbon fibre reinforced plastic, plus multi-spoke forged alloy wheels (19” at the front, 20” at the rear) are fitted.

Completing the transformation are some fancy rear light clusters. These use organic light-emitting diodes, rather than plain LEDs.